VIPs in the startup community gathered under the HUBweek domes at City Hall Plaza over the weekend. Guests, many of whom participated in the weekend’s Demo Day highlighting local businesses like Wayfair, HubSpot, and TripAdvisor, included Tom Ashbrook, host of NPR’s “On Point,” and Bianca Jones Marlin , named one of STAT’s 2017 Wunderkinds. HUBweek, a celebration of art, science, tech, and innovation put on by the Globe, MIT, Harvard, and Mass. General, runs through Sunday night.